Electrical Conductors, Semi-Conductors, and Insulators (Grade 10 NSC Matric Physical Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
How many main categories are materials classified into based on electrical conductivity?
How many main categories are materials classified into based on electrical conductivity?
Three
What is the key property of electrical conductors?
What is the key property of electrical conductors?
They allow current to pass easily
What model explains why metals are good electrical conductors?
What model explains why metals are good electrical conductors?
Sea of electrons model
Which metal has the best electrical conductivity but is too expensive for everyday use?
Which metal has the best electrical conductivity but is too expensive for everyday use?
Silver
Why is aluminium used in power transmission lines?
Why is aluminium used in power transmission lines?
It's much lighter than copper
What is the key property of insulators?
What is the key property of insulators?
They do not allow current to flow
Which material is commonly used as an insulator to coat electrical wires?
Which material is commonly used as an insulator to coat electrical wires?
Plastic
How do semi-conductors behave when their temperature changes?
How do semi-conductors behave when their temperature changes?
Insulators when cold, conductors when hot
Which two elements are the most important semi-conductors?
Which two elements are the most important semi-conductors?
Silicon and germanium
In the conductivity experiment, what indicates a substance is a conductor?
In the conductivity experiment, what indicates a substance is a conductor?
The light bulb glows